Dehli Inkstone specializes in inkstone creation. Each finished inkstone needs 1 pounds of special materials which cost $20 a pound. (One pound contains 16 ounces.) Drilling requires 1 direct labor hour for which workers are paid $10 per hour, and 40 minutes of machine time. The preliminary product (a basic') is inspected to ensure that it is sound. Fifteen percent of the basics are rejected. It is not possible to rework these, and they have no salvage value. Each approved stone is handed to a master craftsperson who spends two hours making a Standard' product or three hours creating a Masterpiece'. Standards use half an hour of machine time and Masterpieces one hour. Finished inkstones are inspected again before packing. Four percent of finished products fail the final quality control assessment and are destroyed. Crafts persons are paid $18 per hour. It takes a basic' worker six minutes to package each inkstone in bubble wrap and a shipping carton, which cost 50 cents in materials and weigh 6 ounces in total. Total overheads are estimated to be $587,400 per year and 97,900 direct labor hours are budgeted. Production plans for the year call for 60% of output to be Standard inkstones and the balance Masterpieces. Dehli Inkstone recently employed a cost analyst, who recommended the adoption of an ABC system to obtain a more accurate understanding of the costs of the Standard and Masterpiece products. She has classified the overheads into the following four cost pools and identified the appropriate cost drivers:

Cost Pool	Dollars		Cost Driver
Materials handling	$	121,000	Pounds of raw materials
Inspection	$	48,400	Inspections
Machine operation & maint.	$	163,350	Machine hours
Labor-related costs	$	254,650	Direct Labor dollars
	$	587,400

For Dehli Inkstone, is it worth implementing a full-fledged ABC system, based upon the findings for these two products?

A. No, for Standard the cost difference between using machine hours and ABC is less than 30 cents per unit, so adoption of the ABC system is not cost-beneficial

B. Yes, all of the single-base allocation systems over cost the Masterpiece

C. No, for Masterpiece the cost difference between using labor hours and ABC is less than 40 cents per unit, so adoption of the ABC system is not cost-beneficial

D. No, the ABC system has failed to reduce total overheads

E. No, the proportions of the different inputs consumed by each product are not sufficiently different to make ABC worthwhile